What is the rear differential ratio of the BRZ?
The BRZ’s rear differential ratio is typically 4.30:1, known as the final-drive ratio, which affects acceleration, engine RPM at cruising speeds, and overall gearing feel.
What the final-drive ratio means for performance
The final-drive ratio indicates how many times the driveshaft must rotate to turn the wheels once. A 4.30:1 ratio means the driveshaft spins 4.3 times for one full wheel rotation. This setup provides strong response from the engine while keeping highway RPM at a reasonable level, depending on tire size and overall gearing.
Typical BRZ configurations and variations
Most BRZ models equipped with the common 6-speed manual transmission use the 4.30:1 final drive. Some markets or model years with automatic transmissions may share a similar ratio, but regional tuning or updates can lead to slight differences. Always verify the exact figure for your specific vehicle model year and market.
Why the ratio matters to drivers
A 4.30:1 final drive influences how quickly the car accelerates in low gears, the engine’s RPM at a given highway speed, and the overall driving feel. It strikes a balance between lively off-the-line performance and comfortable cruising on long trips.
Context with related models
The BRZ shares its powertrain philosophy with the Toyota GR86, and both cars typically use a similar final-drive ratio. Minor variations can occur by model year or region, but 4.30:1 has been the standard reference for the BRZ in recent iterations.
Summary
In short, the rear differential/final-drive ratio for the BRZ is generally 4.30:1, with potential minor variations by market or transmission type. For precise figures, check the specific model year’s build sheet or VIN documentation.
